CN103123737A - Tamper alarm circuit for doorphone - Google Patents
Tamper alarm circuit for doorphone Download PDFInfo
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- CN103123737A CN103123737A CN2012105886946A CN201210588694A CN103123737A CN 103123737 A CN103123737 A CN 103123737A CN 2012105886946 A CN2012105886946 A CN 2012105886946A CN 201210588694 A CN201210588694 A CN 201210588694A CN 103123737 A CN103123737 A CN 103123737A
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- proof alarming
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Abstract
The invention relates to a tamper alarm circuit for a doorphone. The tamper alarm circuit comprises a doorphone or entrance machine circuit, a tamper alarm oscillating circuit and a tamper detection and trigger circuit, wherein a power supply of the doorphone or entrance machine circuit is connected with the tamper alarm oscillating circuit, a call line of the doorphone or entrance machine circuit is connected with the tamper detection and trigger circuit, and the oscillating output of the tamper detection and trigger circuit is connected with the tamper detection and trigger circuit; and the tamper alarm oscillating circuit can generate oscillation when powered by the power supply, the tamper detection and trigger circuit is composed of a single-pole double-throw (SPDT) or double-pole double-throw (DPDT) tamper detection switch, a standby charging circuit and a call drive circuit, and energy storage of the first call can be achieved when tamper detection and call drive are achieved. By means of the tamper circuit scheme which is low in cost, simple and practical, the tamper alarm function of equipment such as doorphones or entrance machines without single chip microcomputers and power supplies usually can be achieved.
Description
Technical field
The present invention relates to building conversational system equipment, especially be applied to the equipment that machine, ladder-port machine etc. in front of the door need dismantling-proof alarming, be particularly suitable for existing transformation without the dismantling-proof alarming functional product and make it have the dismantling-proof alarming function.
Background technology
At present in building conversational system in front of the door the tamper of the equipment such as machine or ladder-port machine be mainly to adopt the single-chip microcomputer Check processing, then by the output of reporting to the police of the modes such as communication or this equipment jingle bell, this scheme is containing to realize it being more satisfactory on the equipment of single-chip microcomputer, but cost is higher for the equipment that itself does not contain single-chip microcomputer, if on the equipment that there is no at ordinary times Power supply substantially can't realize.
In addition, in building conversational system, for system's power saving and saving cost, machine or ladder-port machine mostly adopt the discrete component design and there is no at ordinary times Power supply in front of the door, only have in the situation that has customer call or user to monitor and just provide machine or ladder-port machine power supply in front of the door, the less tamper function that is designed with.Adopt in this case general single-chip microcomputer to solve the more difficult realization of tamper, and the large cost of change amount is also higher.
Summary of the invention
For addressing this problem, the present invention is by a kind of low cost, and simple and practical decomposing prevention circuit scheme can realize without single-chip microcomputer and there is not at ordinary times electricity that the dismantling-proof alarming function of the equipment such as the doorway machine of Power supply or ladder-port machine is arranged.
The present invention is achieved in that a kind of doorway machine dismantling-proof alarming circuit, comprise machine or ladder-port machine circuit in front of the door, it is characterized in that: also comprise dismantling-proof alarming oscillatory circuit and tamper detection and trigger circuit, the power supply of machine or ladder-port machine circuit is connected with the dismantling-proof alarming oscillatory circuit in front of the door; The call circuit of machine or ladder-port machine circuit is connected with trigger circuit with the tamper detection in front of the door; The vibration output of dismantling-proof alarming oscillatory circuit is connected with trigger circuit with the tamper detection.Described dismantling-proof alarming oscillatory circuit will produce vibration when Power supply is arranged, described tamper detection and trigger circuit are comprised of with the calling driving circuit tamper detector switch and the standby charging circuit of a single-pole double-throw (SPDT) or dpdt double-pole double-throw (DPDT), complete the tamper detection and drive the accumulation of energy of calling first of realization simultaneously with calling.
The oscillation frequency of described dismantling-proof alarming oscillatory circuit is 0.25Hz ~ 0.1Hz left and right, and to adjust its dutycycle according to the pulse width signal of calling out be 2% ~ 30%.
The power supply of described dismantling-proof alarming oscillatory circuit is by machine or ladder-port machine circuit are powered by diode D1 in front of the door, again by after capacitor C 1 filtering, form oscillatory circuit by IC1, capacitor C 2 and C3, resistance R 1 and R2, diode D2 and D3, its dutycycle can be regulated by resistance R 1 and R2, capacitor C 3, and formula is: T1=R1*C3*ln2=0.7*R1*C3; T2=R2*C3*ln2=0.7*R2*C3; T=T1+T2, wherein T1 is vibration output high level time, and general value was at 0.1 second ~ 1 second, and at 3 seconds ~ 10 seconds, T was time oscillation period to T2 for vibration general value of output low level time.
In above-mentioned dismantling-proof alarming oscillatory circuit, preferred disposition is that T1 is 0.48 second, and T2 is 3.3 seconds, and T is 3.8 seconds.
Described tamper detection and trigger circuit are comprised of breaking-proof switch SW2, triode Q1, resistance R 3 and R4 calls out the triggering driving circuit, forms the standby charging circuit by diode D5, resistance R 5 and capacitor C 4.
The present invention adopts a kind of low cost, simple and practical dismantling-proof alarming technical scheme, and the equipment of machine or ladder-port machine etc. in front of the door that has solved without single-chip microcomputer or non-transformer power supply at ordinary times needs the dismantling-proof alarming function.During standby, breaking-proof switch is pressed, the call circuit of machine or ladder-port machine passes through the closed node of breaking-proof switch to capacitor charging in front of the door, the vibration output of dismantling-proof alarming oscillatory circuit disconnects by breaking-proof switch with the calling control circuit, and whether machine or ladder-port machine have electricity all can not trigger call circuit in front of the door as long as breaking-proof switch is pressed.When breaking-proof switch is upspring, the electric capacity that has been recharged disconnects with the closed node that is connected by breaking-proof switch of call circuit and drives call circuit, initiate call, the vibration of dismantling-proof alarming oscillatory circuit output simultaneously is connected by the closed node of breaking-proof switch with the calling control circuit.The equipment such as called indoor set are received after calling can be to machine or ladder-port machine power devices in front of the door, when machine or ladder-port machine equipment have electricity in front of the door, the dismantling-proof alarming oscillatory circuit will be started working, the periodic call circuit that triggers sends call signal to equipment such as indoor sets, the equipment such as indoor set receive that at every turn call signal all will carry out ring, reach the dismantling-proof alarming function.Simultaneously due to this part dismantling-proof alarming circuit with machine or ladder-port machine circuit are related less in front of the door, can realize modularization, the simple transformation that is applied to not contain dismantling-proof alarming equipment makes it have the dismantling-proof alarming function.
Description of drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the application structure block diagram of described doorway machine dismantling-proof alarming circuit.
Fig. 2 is the one-piece construction block diagram of described doorway machine dismantling-proof alarming circuit.
Fig. 3 is the machine in front of the door of described doorway machine dismantling-proof alarming circuit or the connection layout of ladder-port machine circuit.
Fig. 4 is the dismantling-proof alarming oscillatory circuit connection layout of described doorway machine dismantling-proof alarming circuit.
Fig. 5 is tamper detection and the trigger circuit connection layout of described doorway machine dismantling-proof alarming circuit.
Fig. 6 is the workflow diagram of described doorway machine dismantling-proof alarming circuit.
Embodiment
See also Fig. 1 and Fig. 2, a kind of doorway machine dismantling-proof alarming circuit, comprise machine or ladder-port machine circuit (101), dismantling-proof alarming oscillatory circuit (102) and tamper detection and trigger circuit (103) in front of the door, the power supply of machine or ladder-port machine circuit (101) is connected with dismantling-proof alarming oscillatory circuit (102) in front of the door; The call circuit of machine or ladder-port machine circuit (101) is connected with trigger circuit (103) with the tamper detection in front of the door; The vibration output of dismantling-proof alarming oscillatory circuit (102) is connected with trigger circuit (103) with the tamper detection.
Seeing also Fig. 3, is the machine in front of the door of described doorway machine dismantling-proof alarming circuit or the connection layout of ladder-port machine circuit.The circuit of machine or ladder-port machine circuit (101) visual or non-video intercom function for building conversational system has in front of the door, has call button, press call button for the visitor and will drag down call circuit to the equipment such as indoor set transmission call signal, the equipment such as indoor set receive the call signal that machine in front of the door or ladder-port machine send, will ring and open doorway machine or the power supply of ladder-port machine, realize intercommunication or the video intercom of machine in front of the door or ladder-port machine and the equipment such as indoor.Dynamo-electric road: CN2 in front of the door as shown in Figure 3 is the indoor set interface; SW1 is that call button and R33 form call circuit; D6, C29, R16, R17, R23, R24, C14, C17, C18, ZD3, C24, D7 form power circuit; CN4, CN3, C31, IC2, IC4 and chip periphery components and parts form the audio frequency talkback circuit; ZD1, R20, C26, C16, C22, R21, R26, Q4, R18 form the unlocking signal testing circuit, D8, R31, C25, Q3, Q2, R25, R32, R22, C23, D9, J1 form the output circuit of unblanking, and IC3 and chip periphery components and parts form the driving delay circuit can arrange by S1 the output of unblanking, C30, the CN1 camera module composition video capture circuit of different durations.Consist of a band the unblank video intercom dynamo-electric road in front of the door of output function.
Seeing also Fig. 4, is the dismantling-proof alarming oscillatory circuit connection layout of described doorway machine dismantling-proof alarming circuit.The power supply of dismantling-proof alarming oscillatory circuit (102) by machine or ladder-port machine circuit (101) in front of the door by diode D1 power supply, then by capacitor C 1 filtering.By IC1, C2, R1, R2, D2, D3, the C3 oscillatory circuit that to form a dutycycle be 0.25Hz ~ 0.1Hz, dutycycle can be regulated by R1, R2, C3, and formula is: T1=R1*C3*ln2=0.7*R1*C3; T2=R2*C3*ln2=0.7*R2*C3; T=T1+T2, wherein T1 is vibration output high level time, and general value is about 0.1 second ~ 1 second, and about 3 seconds ~ 10 seconds, T is time oscillation period to T2 for vibration general value of output low level time.Its best is set to: T1 is about 0.48 second, and T2 is about 3.3 seconds, and T is about 3.8 seconds.
See also Fig. 5, the tamper detection of described doorway machine dismantling-proof alarming circuit and trigger circuit connection layout.It is again simultaneously report to the police vibration output with the standby charging or call out first and trigger change-over switch that described tamper detection and trigger circuit (103) are namely detected as tamper by SW, formed to call out by Q1, R3, R4 again and trigger driving circuit, form the standby charging circuit by D5, R5, C4.
When tamper did not trigger, R5 was connected by SW2 with C4, and the voltage on call circuit charges to C4 by D5, R5; The output of dismantling-proof alarming oscillatory circuit is disconnected by D4 but by SW2 and calls out being connected of triggering driving circuit R3, can not make a call by a low call circuit.When tamper triggered, SW2 triggered driving circuit R3 to C4 with calling and is connected, and the electric charge of C4 drags down call circuit to the Q1 conducting by R3 and makes a call, and after calling out, doorway machine or ladder-port machine circuit will have power supply, thereby the dismantling-proof alarming oscillatory circuit is started working; The output IC1-3 of dismantling-proof alarming oscillatory circuit is connected with R3 by D4 and SW2, periodically by the low call circuit in Q1 position, calls out the equipment such as indoor set, completes dismantling-proof alarming.
As Fig. 6, it is the workflow diagram of described doorway machine dismantling-proof alarming circuit.Tamper does not trigger, and obtains power supply from call circuit and does not work and export unsettled to the capacitor charging oscillatory circuit; Tamper triggers, and the capacitor discharge of charging drives by callings and call circuit connect low, and oscillatory circuit output is connected with the calling driving; Machine or ladder-port machine circuit obtain power supply in front of the door, and oscillatory circuit is started working; Oscillatory circuit periodically drives by calling equipment such as call circuit being connect low, calling indoor set.
Claims (5)
1. a doorway machine dismantling-proof alarming circuit, comprise machine or ladder-port machine circuit in front of the door, it is characterized in that: also comprise dismantling-proof alarming oscillatory circuit and tamper detection and trigger circuit, the power supply of machine or ladder-port machine circuit is connected with the dismantling-proof alarming oscillatory circuit in front of the door; The call circuit of machine or ladder-port machine circuit is connected with trigger circuit with the tamper detection in front of the door; The vibration output of dismantling-proof alarming oscillatory circuit is connected with trigger circuit with the tamper detection; Described dismantling-proof alarming oscillatory circuit will produce vibration when Power supply is arranged, described tamper detection and trigger circuit are comprised of with the calling driving circuit tamper detector switch and the standby charging circuit of a single-pole double-throw (SPDT) or dpdt double-pole double-throw (DPDT), complete the tamper detection and drive the accumulation of energy of calling first of realization simultaneously with calling.
2. described doorway machine dismantling-proof alarming circuit according to claim 1 is characterized in that: the oscillation frequency of described dismantling-proof alarming oscillatory circuit is 0.25Hz ~ 0.1Hz left and right, and to adjust its dutycycle according to the pulse width signal of calling out be 2% ~ 30%.
3. described doorway machine dismantling-proof alarming circuit according to claim 1, it is characterized in that: the power supply of described dismantling-proof alarming oscillatory circuit is by machine or ladder-port machine circuit are powered by diode D1 in front of the door, again by after capacitor C 1 filtering, form oscillatory circuit by IC1, capacitor C 2 and C3, resistance R 1 and R2, diode D2 and D3, its dutycycle can be regulated by resistance R 1 and R2, capacitor C 3, and formula is: T1=R1*C3*ln2=0.7*R1*C3; T2=R2*C3*ln2=0.7*R2*C3; T=T1+T2, wherein T1 is vibration output high level time, and general value was at 0.1 second ~ 1 second, and at 3 seconds ~ 10 seconds, T was time oscillation period to T2 for vibration general value of output low level time.
4. described doorway machine dismantling-proof alarming circuit according to claim 3, it is characterized in that: in described dismantling-proof alarming oscillatory circuit, preferred disposition is that T1 is 0.48 second, and T2 is 3.3 seconds, and T is 3.8 seconds.
5. described doorway machine dismantling-proof alarming circuit according to claim 1, it is characterized in that: described tamper detection and trigger circuit are comprised of breaking-proof switch SW2, triode Q1, resistance R 3 and R4 calls out the triggering driving circuit, forms the standby charging circuit by diode D5, resistance R 5 and capacitor C 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588694.6A CN103123737B (en) | 2012-12-29 | 2012-12-29 | Doorway machine tamper warning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588694.6A CN103123737B (en) | 2012-12-29 | 2012-12-29 | Doorway machine tamper warning circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103123737A true CN103123737A (en) | 2013-05-29 |
| CN103123737B CN103123737B (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210588694.6A Active CN103123737B (en) | 2012-12-29 | 2012-12-29 | Doorway machine tamper warning circuit |
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| Country | Link |
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| CN (1) | CN103123737B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871195A (en) * | 2014-04-04 | 2014-06-18 | 福建星网视易信息系统有限公司 | Building talk-back alarm method, device and system |
| CN110456202A (en) * | 2019-08-23 | 2019-11-15 | 中控智慧(广东)科技有限公司 | A kind of tamper machine testing control circuit and electronic equipment |
Citations (7)
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| JP2000278422A (en) * | 1999-03-29 | 2000-10-06 | Aiphone Co Ltd | Interphone system for multiple dwelling housing |
| CN2777657Y (en) * | 2005-01-19 | 2006-05-03 | 哈尔滨志阳电子科技有限公司 | Monitoring alarm for national treasury door |
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| CN203242115U (en) * | 2012-12-29 | 2013-10-16 | 冠林电子有限公司 | Entrance machine tamper alarm circuit |
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2012
- 2012-12-29 CN CN201210588694.6A patent/CN103123737B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000278422A (en) * | 1999-03-29 | 2000-10-06 | Aiphone Co Ltd | Interphone system for multiple dwelling housing |
| CN2777657Y (en) * | 2005-01-19 | 2006-05-03 | 哈尔滨志阳电子科技有限公司 | Monitoring alarm for national treasury door |
| CN201327673Y (en) * | 2008-11-26 | 2009-10-14 | 福建天马电子有限公司 | Sub computer of security protection interconnected system |
| CN201327672Y (en) * | 2008-11-26 | 2009-10-14 | 福建天马电子有限公司 | Security protection interconnected system |
| CN201498029U (en) * | 2009-08-06 | 2010-06-02 | 上海宝路机电有限公司 | Anti-dismantling type door control box of electronic door control system |
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| CN203242115U (en) * | 2012-12-29 | 2013-10-16 | 冠林电子有限公司 | Entrance machine tamper alarm circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871195A (en) * | 2014-04-04 | 2014-06-18 | 福建星网视易信息系统有限公司 | Building talk-back alarm method, device and system |
| CN103871195B (en) * | 2014-04-04 | 2016-09-14 | 福建星网锐捷通讯股份有限公司 | A kind of building talkback alarm method, Apparatus and system |
| CN110456202A (en) * | 2019-08-23 | 2019-11-15 | 中控智慧(广东)科技有限公司 | A kind of tamper machine testing control circuit and electronic equipment |
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| Publication number | Publication date |
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| CN103123737B (en) | 2016-06-01 |
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